Roy Roberts, the emergency financialmanager for Detroit Public Schools, says he may leave the job if voters reject Proposal 1, the statewide ballot proposal that would affirm the state's ability to take over financially struggling school districts and municipalities.

The proposal would uphold Public Act 4, which took effect in 2011 and gave broad powers to emergency managers to, among other things, modify or terminate collective bargaining agreements. Roberts said if it fails, it would jeopardize the reforms he has put in place since he was appointed 15 months ago.

"In the absence of legislation empowering a single entity with the authority to operate the district, continued progress will be virtually impossible," Roberts wrote in a letter to Gov. Rick Snyder on Tuesday.